|Title of the article||
CUTTER WEAR ESTIMATION BY VIBROACUSTIC METHOD AND SIMULATION OF ACOUSTIC FILED
Dobrovinskiy Igor' Ruvimovich, Doctor of engineering sciences, professor, sub-department of information measuring technology, Penza State University (Penza, 40 Krasnaya str.), firstname.lastname@example.org
The researchers suggest a new vibroacoustic method for measuring the wear of cutting tools using three-stroke integration for machine tools with computer numerical control (CNC). Double glazing vibroacoustic device improves the accuracy of the tool’s cutting edge by suppressing two uncorrelated to each other noise frequencies. The integration is performed over two equal first strokes, the time period of which is multiple of the first power line disturbance. Therefore, the voltage with the frequency of the first disturbance ωp1 in the moments after the first two strokes will be completely suppressed. Having the length of the interval of shift time of two strokes being half the voltage period of the second disturbance frequency ωp2 (workpiece rotation), by the end of the second measure of integration the disturbance voltage frequency will be suppressed as well. During the third stroke there occurs the discharge of the feedback capacitor of the integrator by the voltage from the reference source. It fulfils the “voltage-time” conversion. By filling the interval of a third stroke with pulses of exemplary frequency T0, we obtain the digital equivalent of NX voltage of the tool’s cutting edge state. The possibility of instrument wear estimation by the vibroacustic method is proved experimentally and by mathematical modeling of acustic fields of a sharp or worn cutter.
measurement of cutting tool wear, mathematic modeling, three-stroke integration, subhierarchic method.
1. Dobrovinskiy I. R., et al. Stanki i instrument [Machine tools and instruments]. 1987, no. 3. pp. 16–18.
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